Vue3學習（七）之 列表界面數據展示

一、前言

昨晚可能是因為更新完文章后，導致過於興奮睡不着（寫代碼確實太容易讓人興奮了），結果兩點多才睡着，大東北果然還是太冷了。

不知道是不是因為膝蓋和腳都是冰涼的，所以才導致很晚才能入睡？

剛眯了一會，大約一個小時吧，感覺不錯，接着又想學習了。

二、列表界面展示示例

現在要做的就是把打到頁面的數據，帶樣式，也就是說好看點顯示。

之前我們在《Vue3學習（二）之 集成Ant Design Vue》這篇文章中，有提及組件的使用，對於一個前端不是很好（后端也不咋的），本着拿來主義，我們能現成的是最好、最省事的方式了。

直白點說就是，找Ant Design Vue現成的組件，將列表數據按組件樣式顯示到界面上。

1、挑選自己喜歡的列表樣式

從https://2x.antdv.com/components/list-cn中，找到list列表，找到自己喜歡的風格，如下圖所示：

2、進行數據顯示

2.1、組件在列表顯示

接下來，我們只需要在home里進行修改即可，找到剛才對應組件的位置，把對應代碼拷貝到home中，然后在進行修改即可，示例代碼如下：

<template>
  <a-layout>
    <a-layout-sider width="200" style="background: #fff">
      <a-menu
          mode="inline"
          v-model:selectedKeys="selectedKeys2"
          v-model:openKeys="openKeys"
          :style="{ height: '100%', borderRight: 0 }"
      >
        <a-sub-menu key="sub1">
          <template #title>
                <span>
                  <user-outlined />
                  subnav 1
                </span>
          </template>
          <a-menu-item key="1">option1</a-menu-item>
          <a-menu-item key="2">option2</a-menu-item>
          <a-menu-item key="3">option3</a-menu-item>
          <a-menu-item key="4">option4</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub2">
          <template #title>
                <span>
                  <laptop-outlined />
                  subnav 2
                </span>
          </template>
          <a-menu-item key="5">option5</a-menu-item>
          <a-menu-item key="6">option6</a-menu-item>
          <a-menu-item key="7">option7</a-menu-item>
          <a-menu-item key="8">option8</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub3">
          <template #title>
                <span>
                  <notification-outlined />
                  subnav 3
                </span>
          </template>
          <a-menu-item key="9">option9</a-menu-item>
          <a-menu-item key="10">option10</a-menu-item>
          <a-menu-item key="11">option11</a-menu-item>
          <a-menu-item key="12">option12</a-menu-item>
        </a-sub-menu>
      </a-menu>
    </a-layout-sider>
    <a-list item-layout="vertical" size="large" :pagination="pagination" :data-source="listData">
      <template #footer>
        <div>
          <b>ant design vue</b>
          footer part
        </div>
      </template>
      <template #renderItem="{ item }">
        <a-list-item key="item.title">
          <template #actions>
          <span v-for="{ type, text } in actions" :key="type">
            <component v-bind:is="type" style="margin-right: 8px" />
            {{ text }}
          </span>
          </template>
          <template #extra>
            <img
                width="272"
                alt="logo"
                src="https://gw.alipayobjects.com/zos/rmsportal/mqaQswcyDLcXyDKnZfES.png"
            />
          </template>
          <a-list-item-meta :description="item.description">
            <template #title>
              <a :href="item.href">{{ item.title }}</a>
            </template>
            <template #avatar><a-avatar :src="item.avatar" /></template>
          </a-list-item-meta>
          {{ item.content }}
        </a-list-item>
      </template>
    </a-list>
  </a-layout>
</template>

<script lang="ts">
import { defineComponent,onMounted,ref,reactive,toRef} from 'vue';
import axios from 'axios';
import { StarOutlined, LikeOutlined, MessageOutlined } from '@ant-design/icons-vue';
const listData: Record<string, string>[] = [];

for (let i = 0; i < 23; i++) {
  listData.push({
    href: 'https://www.antdv.com/',
    title: `ant design vue part ${i}`,
    avatar: 'https://zos.alipayobjects.com/rmsportal/ODTLcjxAfvqbxHnVXCYX.png',
    description:
        'Ant Design, a design language for background applications, is refined by Ant UED Team.',
    content:
        'We supply a series of design principles, practical patterns and high quality design resources (Sketch and Axure), to help people create their product prototypes beautifully and efficiently.',
  });
}

export default defineComponent({
  components: {
    StarOutlined,
    LikeOutlined,
    MessageOutlined,
  },
  name: 'Home',
  setup(){
    const pagination = {
      onChange: (page: number) => {
        console.log(page);
      },
      pageSize: 3,
    };
    const actions: Record<string, string>[] = [
      { type: 'StarOutlined', text: '156' },
      { type: 'LikeOutlined', text: '156' },
      { type: 'MessageOutlined', text: '2' },
    ];
    console.log('set up');
    //使用ref進行數據綁定
    const ebooks=ref();
    // 使用reactive進行數據綁定
    const ebooks1=reactive({books:[]})
    onMounted(()=>{
      axios.get("http://localhost:8888/ebook/list?name=spring").then(response =>{
        console.log("onMounted");
        const data=response.data;
        ebooks.value=data.content;
        ebooks1.books=data.content;
      })
    })
    return{
      listData,
      pagination,
      actions,
      ebooks1: ebooks,
      ebooks2:toRef(ebooks1,"books")
    }

  }
});
</script>

重新編譯運行，查看效果如下：

2.2、接口返回數據在列表顯示

明顯現在，可以看到想要用的列表樣式已經在頁面中成功展示了，但這並不是我想要的，我想要的是后端接口返回數據在此處展示，也就是數據源，接下來,我們再次調整Home的代碼，示例代碼如下：

<template>
  <a-layout>
    `<a-layout-sider width="200" style="background: #fff">
      <a-menu
          mode="inline"
          v-model:selectedKeys="selectedKeys2"
          v-model:openKeys="openKeys"
          :style="{ height: '100%', borderRight: 0 }"
      >
        <a-sub-menu key="sub1">
          <template #title>
                <span>
                  <user-outlined />
                  subnav 1
                </span>
          </template>
          <a-menu-item key="1">option1</a-menu-item>
          <a-menu-item key="2">option2</a-menu-item>
          <a-menu-item key="3">option3</a-menu-item>
          <a-menu-item key="4">option4</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub2">
          <template #title>
                <span>
                  <laptop-outlined />
                  subnav 2
                </span>
          </template>
          <a-menu-item key="5">option5</a-menu-item>
          <a-menu-item key="6">option6</a-menu-item>
          <a-menu-item key="7">option7</a-menu-item>
          <a-menu-item key="8">option8</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub3">
          <template #title>
                <span>
                  <notification-outlined />
                  subnav 3
                </span>
          </template>
          <a-menu-item key="9">option9</a-menu-item>
          <a-menu-item key="10">option10</a-menu-item>
          <a-menu-item key="11">option11</a-menu-item>
          <a-menu-item key="12">option12</a-menu-item>
        </a-sub-menu>
      </a-menu>
    </a-layout-sider>`
    <a-list item-layout="vertical" size="large" :pagination="pagination" :data-source="ebooks1">
      <template #renderItem="{ item }">
        <a-list-item key="item.name">
          <template #actions>
          <span v-for="{ type, text } in actions" :key="type">
            <component v-bind:is="type" style="margin-right: 8px" />
            {{ text }}
          </span>
          </template>
          <a-list-item-meta :description="item.description">
            <template #title>
              <a :href="item.href">{{ item.name }}</a>
            </template>
            <template #avatar><a-avatar :src="item.cover" /></template>
          </a-list-item-meta>
        </a-list-item>
      </template>
    </a-list>
  </a-layout>
</template>

<script lang="ts">
import { defineComponent,onMounted,ref,reactive,toRef} from 'vue';
import axios from 'axios';
import { StarOutlined, LikeOutlined, MessageOutlined } from '@ant-design/icons-vue';
const listData: Record<string, string>[] = [];

for (let i = 0; i < 23; i++) {
  listData.push({
    href: 'https://www.antdv.com/',
    title: `ant design vue part ${i}`,
    avatar: 'https://zos.alipayobjects.com/rmsportal/ODTLcjxAfvqbxHnVXCYX.png',
    description:
        'Ant Design, a design language for background applications, is refined by Ant UED Team.',
    content:
        'We supply a series of design principles, practical patterns and high quality design resources (Sketch and Axure), to help people create their product prototypes beautifully and efficiently.',
  });
}

export default defineComponent({
  components: {
    StarOutlined,
    LikeOutlined,
    MessageOutlined,
  },
  name: 'Home',
  setup(){
    const pagination = {
      onChange: (page: number) => {
        console.log(page);
      },
      pageSize: 3,
    };
    const actions: Record<string, string>[] = [
      { type: 'StarOutlined', text: '156' },
      { type: 'LikeOutlined', text: '156' },
      { type: 'MessageOutlined', text: '2' },
    ];
    console.log('set up');
    //使用ref進行數據綁定
    const ebooks=ref();
    // 使用reactive進行數據綁定
    const ebooks1=reactive({books:[]})
    onMounted(()=>{
      axios.get("http://localhost:8888/ebook/list?name=spring").then(response =>{
        console.log("onMounted");
        const data=response.data;
        ebooks.value=data.content;
        ebooks1.books=data.content;
      })
    })
    return{
      listData,
      pagination,
      actions,
      ebooks1: ebooks,
      ebooks2:toRef(ebooks1,"books")
    }

  }
});
</script>
<style>
.ant-layout-sider{
  float: left;
}
</style>

重新編譯運行，查看效果如下：

2.3、接口數據改造

很明顯，列表數據太少，我對接口進行改造，讓其返回多條數據。

我們從service中，不難看出我們做的是，不管傳入什么，都是寫死的走的模糊查詢，這里我們改成動態SQL即可，示例代碼如下：

package com.rongrong.wiki.service;

import com.rongrong.wiki.domain.EBook;
import com.rongrong.wiki.domain.EBookExample;
import com.rongrong.wiki.mapper.EBookMapper;
import com.rongrong.wiki.req.EBookReq;
import com.rongrong.wiki.resp.EBookResp;
import org.springframework.stereotype.Service;
import org.springframework.util.ObjectUtils;

import javax.annotation.Resource;
import java.util.List;

import static com.rongrong.wiki.util.CopyUtil.copyList;

/**
 * @author rongrong
 * @version 1.0
 * @description
 * @date 2021/10/13 23:09
 */
@Service
public class EBookService {

    @Resource
    private EBookMapper eBookMapper;

    public List<EBookResp> list(EBookReq eBookReq) {
        EBookExample eBookExample = new EBookExample();
        //此處代碼的意思相當於，搞了一個Sql的where條件
        EBookExample.Criteria criteria = eBookExample.createCriteria();
        //划波浪線為不推薦使用，這里我們去看源代碼做個替換即可
        if(!ObjectUtils.isEmpty(eBookReq.getName())){
            criteria.andNameLike("%"+eBookReq.getName()+"%");
        }
        List<EBook> eBookList = eBookMapper.selectByExample(eBookExample);
        //List<EBookResp> eBookRespList = new ArrayList<>();
        //for (EBook eBook: eBookList) {
        //    //EBookResp eBookResp = new EBookResp();
        //    ////spring boot 自帶的BeanUtils完成對象的拷貝
        //    //BeanUtils.copyProperties(eBook, eBookResp);
        //    //eBookResp.setId(12345L);
        //    //單體復制
        //    EBookResp copy = copy(eBook, EBookResp.class);
        //    eBookRespList.add(copy);
        //}
        //列表復制
        List<EBookResp> respList = copyList(eBookList, EBookResp.class);
        return respList;
    }
}

查看接口返回數據，如下：

2.4、list列表一行顯示為多條數據

接口改造完成，接着需要對列表顯示內容進行修改，同樣在list列表找到柵格列表，我們還在home中修改，示例代碼如下：

<template>
  <a-layout>
    `<a-layout-sider width="200" style="background: #fff">
      <a-menu
          mode="inline"
          v-model:selectedKeys="selectedKeys2"
          v-model:openKeys="openKeys"
          :style="{ height: '100%', borderRight: 0 }"
      >
        <a-sub-menu key="sub1">
          <template #title>
                <span>
                  <user-outlined />
                  subnav 1
                </span>
          </template>
          <a-menu-item key="1">option1</a-menu-item>
          <a-menu-item key="2">option2</a-menu-item>
          <a-menu-item key="3">option3</a-menu-item>
          <a-menu-item key="4">option4</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub2">
          <template #title>
                <span>
                  <laptop-outlined />
                  subnav 2
                </span>
          </template>
          <a-menu-item key="5">option5</a-menu-item>
          <a-menu-item key="6">option6</a-menu-item>
          <a-menu-item key="7">option7</a-menu-item>
          <a-menu-item key="8">option8</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub3">
          <template #title>
                <span>
                  <notification-outlined />
                  subnav 3
                </span>
          </template>
          <a-menu-item key="9">option9</a-menu-item>
          <a-menu-item key="10">option10</a-menu-item>
          <a-menu-item key="11">option11</a-menu-item>
          <a-menu-item key="12">option12</a-menu-item>
        </a-sub-menu>
      </a-menu>
    </a-layout-sider>`
    <a-list item-layout="vertical" size="large"
            :grid="{ gutter: 16, column: 3 }" :data-source="ebooks1">
      <template #renderItem="{ item }">
        <a-list-item key="item.name">
          <template #actions>
          <span v-for="{ type, text } in actions" :key="type">
            <component v-bind:is="type" style="margin-right: 8px" />
            {{ text }}
          </span>
          </template>
          <a-list-item-meta :description="item.description">
            <template #title>
              <a :href="item.href">{{ item.name }}</a>
            </template>
            <template #avatar><a-avatar :src="item.cover" /></template>
          </a-list-item-meta>
        </a-list-item>
      </template>
    </a-list>
  </a-layout>
</template>

<script lang="ts">
import { defineComponent,onMounted,ref,reactive,toRef} from 'vue';
import axios from 'axios';
import { StarOutlined, LikeOutlined, MessageOutlined } from '@ant-design/icons-vue';
const listData: Record<string, string>[] = [];

export default defineComponent({
  components: {
    StarOutlined,
    LikeOutlined,
    MessageOutlined,
  },
  name: 'Home',
  setup(){
    const pagination = {
      onChange: (page: number) => {
        console.log(page);
      },
      pageSize: 3,
    };
    const actions: Record<string, string>[] = [
      { type: 'StarOutlined', text: '156' },
      { type: 'LikeOutlined', text: '156' },
      { type: 'MessageOutlined', text: '2' },
    ];
    console.log('set up');
    //使用ref進行數據綁定
    const ebooks=ref();
    // 使用reactive進行數據綁定
    const ebooks1=reactive({books:[]})
    onMounted(()=>{
      axios.get("http://localhost:8888/ebook/list?name=").then(response =>{
        console.log("onMounted");
        const data=response.data;
        ebooks.value=data.content;
        ebooks1.books=data.content;
      })
    })
    return{
      pagination,
      actions,
      ebooks1: ebooks,
      ebooks2:toRef(ebooks1,"books")
    }

  }
});
</script>
<style>
.ant-layout-sider{
  float: left;
}
</style>

知識點：

• :grid="{ gutter: 16, column: 4 }"，是進行柵格顯示，柵格間隔16，每行顯示4個
• 這里要刪除:pagination="pagination" ，即分頁顯示

再來重新編譯，查看效果如下：

2.5、列表內容前圖標樣式修改

一切看是很好，但感覺是圖書封面有點小不好看，如下圖：

來接着改樣式，只需在home里調整即可，示例代碼如下：

<template>
  <a-layout>
    `<a-layout-sider width="200" style="background: #fff">
      <a-menu
          mode="inline"
          v-model:selectedKeys="selectedKeys2"
          v-model:openKeys="openKeys"
          :style="{ height: '100%', borderRight: 0 }"
      >
        <a-sub-menu key="sub1">
          <template #title>
                <span>
                  <user-outlined />
                  subnav 1
                </span>
          </template>
          <a-menu-item key="1">option1</a-menu-item>
          <a-menu-item key="2">option2</a-menu-item>
          <a-menu-item key="3">option3</a-menu-item>
          <a-menu-item key="4">option4</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub2">
          <template #title>
                <span>
                  <laptop-outlined />
                  subnav 2
                </span>
          </template>
          <a-menu-item key="5">option5</a-menu-item>
          <a-menu-item key="6">option6</a-menu-item>
          <a-menu-item key="7">option7</a-menu-item>
          <a-menu-item key="8">option8</a-menu-item>
        </a-sub-menu>
        <a-sub-menu key="sub3">
          <template #title>
                <span>
                  <notification-outlined />
                  subnav 3
                </span>
          </template>
          <a-menu-item key="9">option9</a-menu-item>
          <a-menu-item key="10">option10</a-menu-item>
          <a-menu-item key="11">option11</a-menu-item>
          <a-menu-item key="12">option12</a-menu-item>
        </a-sub-menu>
      </a-menu>
    </a-layout-sider>`
    <a-list item-layout="vertical" size="large"
            :grid="{ gutter: 16, column: 3 }" :data-source="ebooks1">
      <template #renderItem="{ item }">
        <a-list-item key="item.name">
          <template #actions>
          <span v-for="{ type, text } in actions" :key="type">
            <component v-bind:is="type" style="margin-right: 8px" />
            {{ text }}
          </span>
          </template>
          <a-list-item-meta :description="item.description">
            <template #title>
              <a :href="item.href">{{ item.name }}</a>
            </template>
            <template #avatar><a-avatar :src="item.cover" /></template>
          </a-list-item-meta>
        </a-list-item>
      </template>
    </a-list>
  </a-layout>
</template>

<script lang="ts">
import { defineComponent,onMounted,ref,reactive,toRef} from 'vue';
import axios from 'axios';
import { StarOutlined, LikeOutlined, MessageOutlined } from '@ant-design/icons-vue';
const listData: Record<string, string>[] = [];

export default defineComponent({
  components: {
    StarOutlined,
    LikeOutlined,
    MessageOutlined,
  },
  name: 'Home',
  setup(){
    const pagination = {
      onChange: (page: number) => {
        console.log(page);
      },
      pageSize: 3,
    };
    const actions: Record<string, string>[] = [
      { type: 'StarOutlined', text: '156' },
      { type: 'LikeOutlined', text: '156' },
      { type: 'MessageOutlined', text: '2' },
    ];
    console.log('set up');
    //使用ref進行數據綁定
    const ebooks=ref();
    // 使用reactive進行數據綁定
    const ebooks1=reactive({books:[]})
    onMounted(()=>{
      axios.get("http://localhost:8888/ebook/list?name=").then(response =>{
        console.log("onMounted");
        const data=response.data;
        ebooks.value=data.content;
        ebooks1.books=data.content;
      })
    })
    return{
      pagination,
      actions,
      ebooks1: ebooks,
      ebooks2:toRef(ebooks1,"books")
    }

  }
});
</script>
<style scoped>
.ant-layout-sider{
  float: left;
}
.ant-avatar {
  width: 50px;
  height: 50px;
  line-height: 50px;
  border-radius: 8%;
  margin: 5px 0;
}
</style>

再次重新編譯，查看下過如下：

三、寫在最后

幾經折騰，終於把樣式和數據整出來了，到此，列表界面數據展示完畢，有興趣的同學自己去嘗試！